电流测量时,错误的方法是()
A.电流测量表要有足够的精度
B.测量仪表内部电阻尽量小
C.测量仪表应具有高的抗外界干扰能力
D.用电平表也可以直接测得电流
参考答案:D
Bill shows no interest in painting, there’s no sense in inviting him to the art show.
A.As if
B.Now that
C.Even if
D.So long as
哪些病变不属于增生性视网膜病变()
A.新血管生成(neovascularization)
B.出血(点状或火焰状)
C.瘢痕(scar)
D.视网膜剥离
E.玻璃体积血